Watch casing



FIG. 1 is a perspective view of a watch casing showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a first end elevational view thereof;

FIG. 6 is a second end elevational view thereof; and,

FIG. 7 is a bottom plan view.

The broken lines shown in FIGS. 2, 4, 5, 6 and 7 are used to illustrateportions of the watch that do not form part of the claimed design.

The ornamental design for a watch casing, as shown and described.